•Knowledge regarding predictive factors is essential in patients with FAIS.•iHOT-33, a normal FV and BMI can predict the iHOT-33 delta score.•Muscle strength and joint mobility were not prognostic ...factors.•This study helps to align patients’ expectations with their potential outcome.
Femoroacetabular impingement syndrome (FAIS) is a hip joint motion-related clinical disorder with a triad of symptoms, clinical signs, and imaging findings. However, scientific evidence is still unclear regarding the best treatment for FAIS.
To assess the value of a physical therapy evaluation in predicting the progression of functional status over the subsequent years in patients with FAIS who are candidates for hip arthroscopy surgery.
In this case-series study, patients with FAIS, candidates for hip arthroscopy surgery, underwent a standard physical therapy evaluation. Baseline data were collected between 2013 and 2019. In 2020/2021, the patients’ functional status was assessed through the International Hip Outcome Tool (iHOT-33). Functional status progression was calculated as the difference between the follow-up and baseline iHOT-33 scores. A multivariate forward stepwise regression analysis was conducted to explore the relationship between baseline characteristics and the functional status progression.
From 353 patients who completed the baseline assessment, 145 completed the iHOT-33 follow-up. The mean (±SD) follow-up time was 58.7 (27.2) months (minimum 12 and maximum 103 months). The iHOT-33 scores increased 20.7 (21.8) points on average, ranging from -39.8 to 76.9 points. Among the 15 potential predictive factors assessed in this study, only baseline iHOT-33 score (β -0.44; -0.061, -0.27), femoral version (β 9.03; 1.36, 16.71), and body mass index (β -0.99; -1.98, -0.01) had the ability to predict the functional status progression.
Patients with a lower baseline iHOT-33 score, lower body mass index, and normal femoral version were more likely to increase their functional status after a minimum of one year of follow-up.
•Femoroacetabular impingement (FAI) syndrome patients had losses in hip muscle strength.•Flexion and rotation movements are reduced in FAI syndrome patients.•Reduced hip strength and motion should be ...considered during rehabilitation programs.
Femoroacetabular impingement (FAI) syndrome is a hip joint motion-related clinical disorder characterized by abnormal contact between the hip joint structures. Abnormal hip morphology and joint pain may impair the hip joint range of motion (ROM) and muscle function. However, FAI effects on hip joint ROM and muscle strength remain controversial.
The purpose of this study was to compare hip joint ROM and muscle strength between FAI syndrome patients and healthy controls.
Twenty FAI syndrome male patients and 20 healthy male controls (CG) matched for age (FAI=28±6 years; CG=27±5 years), body mass (FAI=81±12kg; CG=80±13kg) and height (FAI=177±6cm; CG=178±6cm), participated in the study. Hip joint ROM for flexion, internal rotation and external rotation were assessed through goniometry. Maximal isometric strength for hip flexion, extension, abduction and adduction were evaluated through hand-held dynamometry.
Hip joint ROM was significantly lower in FAI syndrome patients compared with CG for passive flexion (−4%; effect size – ES=0.65), active internal rotation (−42%; ES=1.60), active external rotation (−28%; ES=1.46) and passive external rotation (−23%; ES=1.63). FAI patients’ hip extensors (−34%; ES=1.46), hip adductors (−33%; ES=1.32), and hip flexors (−25%; ES=1.17) were weaker compared to the CG subjects.
FAI syndrome patients presented both hip muscle weakness and reduced joint ROM compared to match CG.
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